The Open Group Base Specifications Issue 8
IEEE Std 1003.1-2024
Copyright © 2001-2024 The IEEE and The Open Group

13. Namespace and Future Directions

In order to prevent future versions of this standard from introducing features that could cause older applications to fail, the prefixes posix_, POSIX_, and _POSIX_ are reserved for use by this standard for any name (e.g. function, variable, utility, etc.). Neither implementations nor applications shall introduce objects in this namespace.

 

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